Alternator Squeal on startup with tiny battery
#1
Alternator Squeal on startup with tiny battery
Last year when I built the car I put in a tiny 16-cell EVO2 battery (~3 pounds). It cranks the car great, even after a month of not starting it. However, after every startup, I get crazy belt squeal on the alternator proportional to how long it'd been since startup. I've tried adjusting the belt both tighter and looser, which has absolutely no effect on the squeal. I've had the alternator rebuilt and it also had no effect.
My best guess is that the battery has such low internal resistance that it actually overloads the alternator at startup until it charges back up to full from the startup cranking.
The motor is a 99 but it's in a 91 car, and I'm just using a 94 alternator so I don't have to deal with the variable voltage regulator.
Anyone else had this phenomenon and/or have any ideas?
It's mostly just really annoying, since it sounds like a wailing banshee for like 30 seconds on a cold morning startup, which isn't ideal at sites where we're supposed to be vaguely quiet.
My best guess is that the battery has such low internal resistance that it actually overloads the alternator at startup until it charges back up to full from the startup cranking.
The motor is a 99 but it's in a 91 car, and I'm just using a 94 alternator so I don't have to deal with the variable voltage regulator.
Anyone else had this phenomenon and/or have any ideas?
It's mostly just really annoying, since it sounds like a wailing banshee for like 30 seconds on a cold morning startup, which isn't ideal at sites where we're supposed to be vaguely quiet.
#5
I put a bigger diameter underdrive pulley on mine. more mechanical advantage but I don't think it makes full charge voltage until about 1500 rpm. just enough to keep the battery charged fully at idle at around 13 volts goes up over 14 with a few more rpm.
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